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Vulnerability · Published Jun 6, 2022 · Assigned by Carrier

CVE-2022-31482Denial-of-Service via internal structure overflow

High 7.5

In plain English

A high-severity buffer overflow in EP4502 from HID Mercury. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.1%top 35.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

An unauthenticated attacker can send a specially crafted unauthenticated HTTP request to the device that can overflow a buffer. This vulnerability impacts products based on HID Mercury Intelligent Controllers LP1501, LP1502, LP2500, LP4502, and EP4502 which contain firmware versions prior to 1.29. The overflowed data leads to segmentation fault and ultimately a denial-of-service condition, causing the device to reboot. The impact of this vulnerability is that an unauthenticated attacker could leverage this flaw to cause the target device to become unresponsive. An attacker could automate this attack to achieve persistent DoS, effectively rendering the target controller useless.

Affected products (as reported)

VendorProductVersions
LenelS2 LNL-X2210 ALL – before 1.29
LenelS2 LNL-X2220 ALL – before 1.29
LenelS2 LNL-X3300 ALL – before 1.29
LenelS2 LNL-X4420 ALL – before 1.29
LenelS2 LNL-4420 ALL – before 1.29
LenelS2 S2-LP-1501 ALL – before 1.29
LenelS2 S2-LP-1502 ALL – before 1.29
LenelS2 S2-LP-2500 ALL – before 1.29
LenelS2 S2-LP-4502 ALL – before 1.29
HID Mercury LP1501 ALL – before 1.29
HID Mercury LP1502 ALL – before 1.29
HID Mercury LP2500 ALL – before 1.29
HID Mercury LP4502 ALL – before 1.29
HID Mercury EP4502 ALL – before 1.29

Weakness: CWE-120 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References